Lochinvar 1, 000 through 2 warranty Sequence of Operation, Heat Transfer Process

Page 57

SEQUENCE OF OPERATION

1.The power switch is placed in the “ON” position and the run/stop switch is in the “RUN” position.

2.120 VAC Power is supplied to the control junction box and to the integral pump.

3.120 VAC Power is supplied to the control Transformer, Ignition Module and Excel 10.

4.The bypass valve will synchronize on initial startup only.

5.24 VAC is supplied to all low voltage controls.

6.Integral pump starts and is proven by a Flow Switch.

7.Command Display Set Point (Operating Temperature) is set to call for heat.

8.

Excel 10 Controller initiates

a start-up sequence

 

by checking the Temperature

Sensors and input

 

signals from the safety controls.

 

9.Excel 10 enables the Ignition Module.

10.Ignition Module enables the Variable Frequency Drive.

11.Excel 10 Controller drives the Variable Frequency Drive.

12.The Variable Frequency Drive supplies the

Combustion Air Blower with 230 VAC 3 phase power.

18.Relay contacts prove operation of the Igniter, Gas Valves and Safety Switches to the Excel 10.

19.Variable Ratio Gas Valve senses the pressure from

the Combustion Air Blower and supplies gas to the orifice and into the Blower inlet to pre-mix.

20.The Gas/Air mixture is forced into the Burner and out of the Burner Ports under pressure.

21.Hot Surface Igniter lights the Gas/Air mixture and then serves as a flame sensor to prove Main Burner Flame by rectification.

22.Burner is now in a soft start firing at 50% of rated input.

23.Excel 10 Controller signals the Variable Frequency Drive to adjust blower speed based on desired water temperature Set Point.

24.

Burner input rate is variable

down to 25% of rate

 

or

up to 100% of rate as

required to satisfy the

 

Set

Point programmed into

the Command Display.

25.Excel 10 Controller senses Inlet Water Temperature to the

Primary Heat Exchanger

and provides a

signal

to adjust the floating

point Bypass

Valve

(based on return/inlet control choice).

 

26.Bypass Valve adjusts position to maintain an inlet temperature to the Primary Heat Exchanger above the dew point of flue products.

27.Operation of the Bypass Valve maintains water

temperatures

above the dew

point of

flue products

to ensure

that condensate

formation

occurs only

in the Secondary Heat Exchanger.

 

13.Combustion Air Blower starts operation and drives to 100% speed for prepurge.

14.Blower makes the low air switch contacts to enable the Ignition Module.

15.Blower cycles down to 50% speed and the Ignition Module initiates the heat-up sequence of the Hot Surface Igniter.

16.Hot Surface Igniter proves 1800°F (982°C) Ignition Temperature by current draw through the Ignition Module.

17.The Ignition Module supplies voltage to the Variable Ratio Gas Valve and the Redundant Gas Valve.

Heat Transfer Process

28.Burner Input continues to increase until water temperature reaches the Set Point temperature.

29.Burner Input may stabilize at a fixed rate where demand equals input.

30.Burner Input will decrease rate when water temperature exceeds temperature Set Point and demand.

31.Heated products of combustion pass over the Primary Heat Exchanger transferring heat to the water.

57

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Contents Warranty Special Instructions To OwnerIFB/IFW-i&s-05 Table of Contents Do not Checking EquipmentWhat to do if YOU Smell GAS Owner WarningRecommended Service Clearances Installation Procedure Location of UnitTable a Clearances from Combustible ConstructionCombustion Air Direct from Outside Minimum Recommended Combustion Table BAIR Supply to Mechanical Room 500 in2 3226 cm2 667 in2 4303 cm2 000 in2 12,903 cm2Construction Air Filter Construction AIR FilterVenting Construction AIR Filter Kits Table CTable D Category IV Flue Pipe SizesCategory IV Venting Category IV Positive Pressure Venting SystemCategory IV Flue Pipe Materials Venting Guidelines for a Category IV VentDrain Tee Installation General Category IV Vent Termination ClearancesExceed a maximum of 100 equivalent feet 30.5 m in length Vertical Venting Terminations Masonry Chimney InstallationsTable E Sidewall Venting TerminationsSidewall Vent Cap Kits Sidewall VentDirect Vent INTELLI-VENT Systems Location of a Sidewall Vent TerminationDirect Vent and Intelli-Vent Flue Air Inlet Pipe Sizes Table FAir Inlet Length of Air Inlet PipeCombined Combustion Air Inlet Points Vertical Direct Vent SystemsHorizontal Direct Vent Multiple Vertical Direct Vent InstallationsSidewall Combustion AIR Inlet Table GLocation of a Sidewall Air Inlet Cap These are Multiple Horizontal Direct Vent InstallationsCombined Air Inlet Points Table HMaximum Length of an Intelli-Vent System Air Inlet Sidewall Input Flue Pipe Btu/hr SizeAir Inlet Sidewall Input Flue Pipe Horizontal INTELLI-VENT with Vertical Combustion AIRBtu/hr Size Cap Kit 500,000 SVK3026Location of a Rooftop Air Inlet Cap Vertical Combustion Horizontal INTELLI-VENT AIR InletTable J Table K GAS Supply GAS Pressure TestGAS Connection Table LMultiple Appliance Installations Gas Pipe Size Chart Recommended Gas Pipe Size Single Appliance InstallationsTable M Table NInstall Piping to Control GAS Manifold Pressure AdjustmentGAS Piping Checking GAS Supply PressureChecking Manifold GAS Pressure Water Connections Water ConnectionsSecondary Heat Exchanger Primary Heat Exchanger Inlet and Outlet ConnectionsMinimum Pipe Size Requirements Bypass Valve Synchronization Integral BypassIntegral Circulator Bypass Piping AssemblyOptional Intermittent Pump Operation Bypass Initial Set-up of Maximum Water FlowBtu/hr Input Temperature Rise Minimum Water TemperaturesTable P Bypass OperationTable Q Water Flow SwitchLOW Water Cutoff GAS Train and ControlsDiaphragm GAS Valve Ratio GAS Valve Relief ValveElectrical Connections Jacket AssemblyFront Control Panel Locations Access to Components and ControlsTransformer and Relay Locations Variable Frequency DriveHigh GAS Pressure Switch LOW GAS Pressure Switch Optional LOW AIR Pressure SwitchExcel Be used as a diagnostic indicator Default Values Pre-programmed in the Excel Temperature AdjustmentTable S To Activate the Manual OverrideConfiguring Command Display Password FunctionTable T Display Default Values Accessing the SIX Changeable Points from Command DisplayTotal Run Time Calculated Set PointSet Point Temp Sequencing TypeCommand Display Data Screen Table U Status PointsStatus Point Operational Modes Hot Surface Igniter OnOptional on Heating Boilers Only Outdoor Reset Function SelectionsEfficiency Optimized with Time Equalization Multiple Appliance InstallationsSingly Terminated FTT Network Bus Topology Specifications Interfacing Multiple AppliancesTable W Additional Components Used to Interface Multiple Appliances Wire Termination for E-Bus ConnectionTypical Building Management System Diagram High Water Temperature Limit ControlService Parts HOT Surface Ignition SystemIgnition Module Lockout Functions Table Y Diagnostic Status IndicationIgnition and Control Timings Table ZIndicator OPERATION/DIAGNOSTIC LIGHTS, Resets and SwitchesBurner Table AACombustion Air Blower and Transition Chamber Combustion AIR BlowerSystem Optional Condensate ManagementTable BB Condensate Drain Location On RearCondensate Testing Condensate Trap InstallationReplenishing the Neutralizer Lighting Instructions Install Condensate TrapIgnition System Checkout To Turn OFF GAS to ApplianceHeat Transfer Process Sequence of OperationEnd of Sequence MaintenanceBurner Maintenance Burner Removal and CleaningLocation of Primary Heat Exchanger Burner Cleaning ProcedureSecondary Heat Exchanger Inspection Lubrication Freeze Protection Freeze Protection for a Heating Boiler System If Required Heating Boiler InstallationsWater Treatment Water Connections Heating Boilers onlyPiping Lengths Primary Loop Circulator Pump SpecificationsBoiler Circulator Pump Limitations Circulator Pump OperationPRIMARY/SECONDARY Boiler Piping Minimum Boiler Water TemperaturesTable CC Boiler Temperature Rise Chart Table DDMaximum Flow for Heating Boiler Btu/hr Input Maximum FlowTEMPERATURE/PRESSURE Gauge Typical Heating Boiler InstallationsPlacing the Boiler Operation Installation with a Chilled Water System Boiler Operating Temperature ControlBoiler Operation Typical Water Heater Piping with Storage Tank Water Velocity ControlTable EE Table FFMaximum Flow Rate Btu/hr Input Water Chemistry Single Water Heater Piping with Two Storage Tanks Piping Multiple Unit InstallationsPump Operation Table GGHeat Exchanger Common ManifoldTable HH Thermostat SettingsOptional Relief Valve Thermal ExpansionCathodic Protection Ladder Diagram PWM Wiring Diagram
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000, 000 through 2, 1 specifications

Lochinvar 1 is a remarkable achievement in the realm of modern technology and engineering. As a powerful and efficient water heater, it has been designed to cater to a wide range of residential and commercial needs. One of the standout features of Lochinvar 1 is its advanced heating technology, which incorporates a high-efficiency condensing design. This technology allows the unit to achieve impressive energy savings by maximizing heat transfer while minimizing energy consumption.

The Lochinvar 1 utilizes a stainless steel heat exchanger that enhances durability and corrosion resistance. This not only extends the lifespan of the unit but also ensures consistent performance over time. Coupled with a user-friendly control system, users can easily adjust settings and monitor performance, enhancing overall convenience and usability.

Another key characteristic of the Lochinvar 1 is its compact design, making it suitable for a variety of installation environments. Whether in a residential basement or a commercial utility room, the unit’s space-saving configuration allows for efficient use of available area without compromising on capability.

Safety features are integral to the Lochinvar 1, providing peace of mind for users. The unit is equipped with advanced monitoring systems that can detect irregularities and automatically shut down the system if necessary. This not only protects the equipment but also enhances the safety of the environment in which it operates.

In terms of performance, Lochinvar 1 boasts a high recovery rate, ensuring hot water is available on demand. This is particularly beneficial for settings with high water usage, allowing simultaneous operations without lag.

Moreover, the unit supports various venting options, offering flexibility during installation. Whether using traditional vertical venting or innovations like direct venting, Lochinvar 1 accommodates different building designs and local codes, making it highly versatile.

In conclusion, Lochinvar 1 epitomizes the melding of efficiency, reliability, and user-friendly technology. With its high-performance features, robust safety systems, and adaptable installation options, it stands out as a forefront player in the water heating industry, meeting the diverse needs of today's consumers and businesses alike.
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